Index: lib/Support/GraphWriter.cpp
===================================================================
--- lib/Support/GraphWriter.cpp
+++ lib/Support/GraphWriter.cpp
@@ -219,7 +219,7 @@
 
     errs() << "Running '" << GeneratorPath << "' program... ";
 
-    if (ExecGraphViewer(GeneratorPath, args, Filename, wait, ErrMsg))
+    if (ExecGraphViewer(GeneratorPath, args, Filename, true, ErrMsg))
       return true;
 
     args.clear();